Micron ZBT® series, 4Mbit SRAM, 256K x 18 organization, 9 ns access time, 83 MHz, parallel interface, 3.135 V supply, 100 TQFP, 0°C to 70°C.
| Parameter | Value |
|---|---|
| Series | ZBT® |
| Interface_type | Parallel |
| Mounting_type | Surface Mount |
| Operating temperature high | 0°C to 70°C (TA) |
| Frame_size | 4Mbit |
| Access time | 9 ns |
| Memory_type | Volatile |
| Frequency_hz | 83000000.0 |
| Package_type | Bulk |
| Memory format | SRAM |
| Product_status | Active |
| Supply_voltage_v | 3.135 |
| Memory organization | 256K x 18 |
The Micron MT55L256L18F1T-12TR is a 4Mbit ZBT synchronous SRAM organized as 256K x 18 bits. ZBT architecture eliminates the dead bus cycle between read and write transitions.
The operating temperature range of 0°C to 70°C places this SRAM in the commercial grade. It is not rated for industrial enclosures or outdoor cabinets.
The access time is 9 ns, measured from the clock edge to data valid. This is the key timing parameter for bus margin analysis at the 83 MHz operating frequency.
There is no official direct replacement from Micron because the part is still active. The peer parts listed (MT29F4G08, MT29F1G08, MT25QU256) are Flash memories, not functional equivalents to this ZBT SRAM.